freebsd-dev/sys/cam/cam_xpt_sim.h
Alexander Motin 711f661393 Add two functions xpt_batch_start() and xpt_batch_done() to the CAM SIM KPI
to allow drivers to handle request completion directly without passing
them to the CAM SWI thread removing extra context switch.
Modify all ATA/SATA drivers to use them.

Reviewed by:	gibbs, ken
MFC after:	2 weeks
2012-05-12 13:55:36 +00:00

60 lines
2.4 KiB
C

/*-
* Data structures and definitions for dealing with the
* Common Access Method Transport (xpt) layer.
*
* Copyright (c) 1997 Justin T. Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _CAM_CAM_XPT_SIM_H
#define _CAM_CAM_XPT_SIM_H 1
#include <cam/cam_xpt.h>
#include <cam/cam_queue.h>
/* Functions accessed by SIM drivers */
#ifdef _KERNEL
int32_t xpt_bus_register(struct cam_sim *sim, device_t parent,
u_int32_t bus);
int32_t xpt_bus_deregister(path_id_t path_id);
u_int32_t xpt_freeze_simq(struct cam_sim *sim, u_int count);
void xpt_release_simq(struct cam_sim *sim, int run_queue);
u_int32_t xpt_freeze_devq(struct cam_path *path, u_int count);
u_int32_t xpt_freeze_devq_rl(struct cam_path *path, cam_rl rl,
u_int count);
void xpt_release_devq(struct cam_path *path,
u_int count, int run_queue);
void xpt_release_devq_rl(struct cam_path *path, cam_rl rl,
u_int count, int run_queue);
int xpt_sim_opened(struct cam_sim *sim);
void xpt_done(union ccb *done_ccb);
void xpt_batch_start(struct cam_sim *sim);
void xpt_batch_done(struct cam_sim *sim);
#endif
#endif /* _CAM_CAM_XPT_SIM_H */